basic-db.js

'use strict'

var http = require('http');

const PORT = 4000;

let inMemoryStore = {};

const parseQueryParams = (str) => {
	const split = str.split('&');
	return split.reduce((ret, cur) => {
		const kv = cur.split('=');
		ret[kv[0]] = kv[1];
		return ret;
	}, {});
};

const setValueHandler = (request) => {
	const params = parseQueryParams(request.url.split('?')[1]);
	Object.keys(params).forEach((param) => {
		inMemoryStore[param] = params[param];
	});
	return 'success';
};

const getValueHandler = (request) => {
	const params = parseQueryParams(request.url.split('?')[1]);
	return inMemoryStore[params.key] || 'NULL';
};

const noop = (request) => {
	return;
};

//relatively generic route handler
const fetchHandler = (request) => {
	const url = request.url.split('?')[0];
	const key = `${request.method}${url}`;
	console.log(`Handling ${key}`);
	switch (key) {
		case "GET/set":
			return setValueHandler;
		case "GET/get":
			return getValueHandler;
		default:
			return noop;
	}
}

const handle = (request, response) => {
	const handler = fetchHandler(request);
	response.end(handler(request));
}

const server = http.createServer(handle);

//start up the server
server.listen(PORT, function(){
    console.log("Listening on port %s", PORT);
});